Page 1: ...Service Manual IA 2 Integrated Amplifier T BNakamichi...
Page 2: ...JPN Abbreviation EP Europe AUS Australia UK United Kingdom SAU Saudi Arabia SWT Switzerland OTR Other GER Germany JPN Japan 1 3 Cautions Warnings 1 Product Safety Notice A Parts marked with the symbol...
Page 3: ...28A DA04731A DA04733A DA04730A DA04729A OB90451A 0D06457A OD06459A OD06460A 0D06458A DA04734A 0D06136A Description Accessory Ass y EP SWT GER Accessory Ass y UK Accessory Ass y SAU Accessory Ass y AUS...
Page 4: ...2 MECHANISM ASS Y AND PARTS LIST 2 1 Synthesis a...
Page 5: ...Push Knob Tone Knob Ass y Rec Out Knob Ass y Power Joint Volume Knob Ass y Volume LED P C B Ass y Leg Selector P C B Ass y EP UK SWT GER Selector P C B Ass y AUS SAU OTR JPN Eq Amp P C B Ass y EP UK...
Page 6: ...y A02 Schematic Ref No A01 01 02 03 04 05 06 07 08 Part No HAO6664A OHO6633A OQHOS860A 0J07142B 0H06621B OHOSS61A HAO6ES6C O0HO6620B OHOS858A Description Front Pane Ass y Front Panel Power indicator L...
Page 7: ...K SWT GER BAO8060A Power Switch P C B Ass y AUS 1 SAU OTR JPN 02 BA08057A Headphone P C B Ass y 1 03 BA08946A Front P C B Ass y EP UK SWT 1 GER BA08947A Front P C B Ass y AUS SAU 1 OTR JPN 04 BA08064A...
Page 8: ...9A OB80356A OB80355A 0B80357A 0 03319A OE00868A 0E03157A Description Heat Sink Ass y Transistor Sheet TR 2SA1491 Q182L R TR 28C3421 Q176L A TR 2SC3855 Q181L R Power Amp P C B Ass y EP UK SWT GER Power...
Page 9: ...3 MOUNTING DIAGRAMS AND PARTS LIST 3 1 Volume LED P C B Ass y 3 2 Sensor P C B Ass y 3 3 Front P C B Ass y ora hier Grace 23800a0 AF 88S FRONT PCB Fig 3 3...
Page 10: ...C85387A LED SLR 34DC3F OB06398A SID 1SS176 0B12693A SID S5688B OB06398A SID 1SS176 9B80082A Jumper Wire EP UK GER 0B12693A SID S5688B AUS SAU OTR JPN OB06398A SID 188176 0B92043A_ X tal 4 19MHz 0B5137...
Page 11: ...c145l fu oor R42L 470K ci46t 7 50V 56K 4 RISSL RISSR C146R UbO1 UPD7S5104CW 13 2 to HA BFR ACE Ecs si RS1 so RS2 cl RS3 PIN xt PAL x2 cL R6EO6 10K CbO1 0 022 SYSTEM CONTROL MPU brerp bt PRE AMP O146L...
Page 12: ...Service Manual Nakamichi Anmolifier1...
Page 13: ...Supply P C B Ass y 0 ccc ee ee ee tee eee ee eee eee et eee eee 11 6 11 Eq Amps PC Bi Assye osecs itso tote dusk ole SERIR acct Shia We tirsne asta SE eS Sin WideSea yeice a Be va Sree oh 12 6 12 Sele...
Page 14: ...A Packing Package Ass y Carton Box DA04422A DA04443A DA04437A DA04423A 0B90451A 0D06141A 0D06140A DA04428A 0D06136A Accessory Ass y EP SWT GER AUS Accessory Ass y UK Accessory Ass y OTR Accessory Ass...
Page 15: ...Fig 2 2 1 Loosen screws FO1 12 pcs and remove F02 Bottom Cover Ass y Power Supply PC B Assy Power Amp PC B Assy FO Ress a Foi FO Fo2 SNe Bottom Cover Ass y Bottom View Fig 2 2 2 3 Front Panel Ass y R...
Page 16: ...q1 2 3 4 Red Out Selector CD Position CD Input Jacks Short with shorting pins Speaker Output Terminals Unloaded Turn OFF the power Turn VR71L VR71R on the Power Amp P C B Ass y fully counterclockwise...
Page 17: ...MECHANISM ASS Y AND PARTS LIST 5 Australia 20 5 1 Synthesis LO3 LO4 sy 1 Front Chassis As Fig 5 1...
Page 18: ...N 4 EP GER UK 0B90530A _ Cord Bushing 2104 SWT 0B90280A pa Bushing 2271 AUS OTR PN OHO5863B Rear Panel EP OHO5864A_ Rear Panel UK OHO5865B Rear Panel SWT OHO5955A_ Rear Panel GER OHO5956A_ Rear Panel...
Page 19: ...SWT GER UK BAO8030A Power Switch P C B Ass y AUS OTR JPN BA08027A Headphone P C B Ass y BAO8026A Front P C B Ass y EP SWT GER UK BA08025A Front P C B Ass y AUS OTR JPN BA08034A Speaker Switch P C B As...
Page 20: ...2SA1358 Q178L R OB10881A TR 28C3421 Q176L R Q177L R 0B1i0290A TR 2SA1491 Q180L R Q182L R 0B10291A TR 2SC3855 Q179L R Q181L R BAO8029A Power Amp P C B Ass y EP SWT GER UK BAO08028A Power Amp P C B Ass...
Page 21: ...Os recC 3 AC INPUT H S ey ee a Fig 6 1 3 For OTR JPN 6 2 Power Switch P C B Ass y 6 4 Headphone P C B Ass y Fig 6 1 1 For EP SWT UK Cre TTA ea RISBL ono O Fig 6 2 M401 YS Fig 6 1 2 For AUS 6 3 Volume...
Page 22: ...2P T Post 4P T Post 2P Connector Ass y 0B60883B rie ae Terminal C B C179L R 0B47073A CML 0 022u 100V J C180L R 0B47073A CML 0 022y 100V J CN117 0B80359A 4P Connector Ass y CN122 OB80360A 2P Connector...
Page 23: ...10000u 63V CML 0 1p 638V J CML 0 047 100V J CE 2200u 35V CML 0 1y 63V J CML 0 047p 100V J CE 2200u 16V CML 0 1p 63V J CE 1000u 10V 0B47075A 0B40791A OB47077A 0B47075A 0B40792A OB47077A OB47075A 0B4078...
Page 24: ...P 0B11713A IC mPC4570C 0B09725A 1 6w J qi 0B10382A 2SC3065 E F OBO9677A 1 6W J 0B80344A Phone R Ass y 2P 0B10078A 2SC2240 GR OBO9685A i 1 6W J 0B06322A 2SC2002 K L 442 OB09701A 1 6w J 0B84388A Screw T...
Page 25: ...6K 1 4WJ 100 1 4WwJ 100K 1 4WJ 1 5K 1 4wWJ 56K 1 4WJ 100 1 4wJ 100K 1 4WJ 1 5K 1 4wJ 56K 1 4WJ 100 1 4wWJ 47K 1 4WJ 47K 1 4WJ 22K RK 47K CML 1000P 50V J CML 1000P 50V J CML 1000P 50V J 13 0B84287A 0B8...
Page 26: ...41A OB24355A OBO5577A OB05615A 0B24355A OBO5577A OBO1679A 0B09733A Fig 6 13 RK 47 1 4wWJ RK 910 1 4WJ RK 47K 1 4WJ Fuse Resistor 330 1 4W J EP SWT GER UK RK 330 1 4WJ AUS OTR JPN RK 22K 1 4WJ RK 2K 1...
Page 27: ...2 50V J CML 0 0222 50V J CML 0 022u 50V J CSP 33P 50V J CML 1000P 50V J CML 0 474 68V J CC 0 022u 25V Z OB47117A 0B40786A 0B41554A 0B40158A 0B40501A 0B70186A 104 0B70190A 8105 OB70196A S106 0B70161A C...
Page 28: ...7 SCHEMATIC DIAGRAMS Mute 7 7 1 IC Block Diagrams vec 8 Out Flip Flop 5 GND 3 4 Fig 7 1 2 Power Amp Protector 4PC1237 Fig 7 1 1 Analog Function Switch LC7822 16...
Page 29: ...3 PL3 Fx 28 1NT4 P00 Nrortizg K4 P120 P 123 Norns K4 PI30 P133 NV rorts K4 PI40 P 143 MPU CLOCK CLOCK OUTPUT CONTROL STANDBY CONTROL CLOCK GENERATOR CLOCK DIVIDER PTHOO PTHOS re PCL P22 P13 1INT30 PI2...
Page 30: ...aiedou ace j22 Tuner LED drive signal Active L fa RoE o ACKtEDaie domlAcmea fs pa rat 0 reeatsDcwedem Acmet as SHE 0 nantumDaeveseaaoeAA Power ON LED drive signal Active L Not used Open 5 V is supplie...
Page 31: ...Inverting Input B Non Inverting Input A Vv TOP VIEW Fig 7 1 4 Operational Amp NJM7805A uPC4570C pes Bin r Aln Jol 5 GND o vec Bout AOut Jo Fig 7 1 5 Motor Driver BA6208 19 rary 2SA733 2SA958 2S8C945...
Page 32: ...rolytic capacitor 100 16V 100u 16V 20 EQ AMP P C B CN 103 To cD DIRECT L 3 VOLUME A GND 12 P C B cb olrect rR iP CN 101 CN 101 3 cD DIRECT L 3 een CD DIRECT R omy ee ee OND rn ee Te A es See RE eee oe...
Page 33: ...t a Se aera aie co LCHE DIRECT L_RCHG PHONO EQ AMP Ui01 upc4s70C C1O7L 2 2750V LN 220P EP UK SWT GER 100P AUS OTR JPN on 0431 Lioie c103L 28c2002 PJ101 R142L RI13L R114L 50uH 10 16V LN 243 F 464K F Lc...
Page 34: ...i2 er _ 28 2878 28 2878 a3 Cg Kk 0 6v 28V l R610 Nan ny 41K a8 N x 3 6 En Gr Ss 3 Q462 2SA953 28V RESaer re eee 20V R616 100K R617 100K CN 115 LcH ouT GND PT rch OUT 43 no x a a O GND 4 a 3 ee Bue a6o...
Page 35: ...GND I I 2SA1145 1 1 28C2705 2SA1491 1 2SC3855 1 I I AC INPUT o Or O g i is i re f I 3 i Nee Sa ein ee See tS on Ce ee Ee J Q608 DTA144ES IN Ecg tev GND out 2SA1358 78M05 2SC3421 wv oo 64 ies 62 CD DI...
Page 36: ...K 301 uPC1237H asia R312 10K aa eat 10K 6 8V 13 5 g 18 Rs we Sis 86 o of 3 248 as a S42 08 S ays s 38 a i D302 5688 22K AUS OTR JPN EP UK SWT GER EP UK SWT GER AUS OTR JPN R196R 1 52V Q 6 x z 2 rey S...
Page 37: ...72 1 1 i 1 1 AC INPUT AC INPUT i V 1 1 1 mee ee See ee ee ea ee eR Sey bee ee eco oe be eee ce beta Bee 4 in ne a Se a i on S ov 1 i t 1 1 1 1 i i t 1 1 i Fed i gs 4 2 i 1 POWER ae 3 SWITCH ZA 13 154...
Page 38: ...ed unless otherwise specified 8 Wire tube color is shown in _ Power Switch PC B Assy CN 405 to Power Supply PC B Assy CN 123 CN 124 Power Transformer ear a a gay en otras ps me 7 Remote P C B Ass y I...
Page 39: ...19 LORN Oo 3 PBLU f 2 HE wir Z Power Amp PC B Assy 72h _D Power Switch PC B Assy jecre SWITZERLAND 230V UK 240V i ol I Cu Heo jsuk eeoift Gno tv Speaker Switch P C B Assy Front P C B Assy CN 120 ORN H...
Page 40: ...I i yo1937as YOSNES NOILYYadO sai 34vS 40 Vauv OSV 1 yosnas_ 94 aevs 3NOHdGvaH 4OsNas 3HL me ongeyaH thou BLNW 440 NO Y3MOd Se 7 NOTL93S YOLIZLONd a xv Busivads oa 3NnL ao dWy YaMOd cvavaS BdAL v YaI...
Page 41: ...s per channel into 2 ohms 10 50 000 Hz 20 20 000 Hz 0 0 5 dB 5 80 000 Hz 0 3 dB Better than 105 dB re rated power Better than 83 dB IHF A 202 0 1 or less 187 mW 28 A peak per channel the specified inp...
Page 42: ...outputs measurements are made from the specified input to Rec Out Input Sensitivity Impedance Phono MC 5 0 125 mV 100 ohms MME ee eae ieistecies 2 5 mV 47 kohms CD Tuner Tape Aux 150 mV 20 kohms Maxim...
Page 43: ...ishishinjuku Shinjuku ku Tokyo 163 Phone 03 3342 4461 Telex 2324721 NAKAM J 19701 South Vermont Ave Torrance CA 90502 Phone 213 538 8150 276 South West Marine Drive Vancouver B C V5X 2R4 Phone 604 324...
